1 /******************************************************************************
3 * (c) Copyright 2009-13 Xilinx, Inc. All rights reserved.
5 * This file contains confidential and proprietary information of Xilinx, Inc.
6 * and is protected under U.S. and international copyright and other
7 * intellectual property laws.
10 * This disclaimer is not a license and does not grant any rights to the
11 * materials distributed herewith. Except as otherwise provided in a valid
12 * license issued to you by Xilinx, and to the maximum extent permitted by
13 * applicable law: (1) THESE MATERIALS ARE MADE AVAILABLE "AS IS" AND WITH ALL
14 * FAULTS, AND XILINX HEREBY DISCLAIMS ALL WARRANTIES AND CONDITIONS, EXPRESS,
15 * IMPLIED, OR STATUTORY, INCLUDING BUT NOT LIMITED TO WARRANTIES OF
16 * MERCHANTABILITY, NON-INFRINGEMENT, OR FITNESS FOR ANY PARTICULAR PURPOSE;
17 * and (2) Xilinx shall not be liable (whether in contract or tort, including
18 * negligence, or under any other theory of liability) for any loss or damage
19 * of any kind or nature related to, arising under or in connection with these
20 * materials, including for any direct, or any indirect, special, incidental,
21 * or consequential loss or damage (including loss of data, profits, goodwill,
22 * or any type of loss or damage suffered as a result of any action brought by
23 * a third party) even if such damage or loss was reasonably foreseeable or
24 * Xilinx had been advised of the possibility of the same.
26 * CRITICAL APPLICATIONS
27 * Xilinx products are not designed or intended to be fail-safe, or for use in
28 * any application requiring fail-safe performance, such as life-support or
29 * safety devices or systems, Class III medical devices, nuclear facilities,
30 * applications related to the deployment of airbags, or any other applications
31 * that could lead to death, personal injury, or severe property or
32 * environmental damage (individually and collectively, "Critical
33 * Applications"). Customer assumes the sole risk and liability of any use of
34 * Xilinx products in Critical Applications, subject only to applicable laws
35 * and regulations governing limitations on product liability.
37 * THIS COPYRIGHT NOTICE AND DISCLAIMER MUST BE RETAINED AS PART OF THIS FILE
40 ******************************************************************************/
41 /*****************************************************************************/
45 * This file contains low level functions to get/set time from the Global Timer
46 * register in the ARM Cortex A9 MP core.
49 * MODIFICATION HISTORY:
51 * Ver Who Date Changes
52 * ----- ------ -------- ---------------------------------------------------
53 * 1.00a rp/sdm 11/03/09 Initial release.
54 * 3.07a sgd 07/05/12 Upadted get/set time functions to make use Global Timer
59 ******************************************************************************/
60 /***************************** Include Files *********************************/
63 #include "xpseudo_asm.h"
64 #include "xil_types.h"
65 #include "xil_assert.h"
68 /***************** Macros (Inline Functions) Definitions *********************/
70 /**************************** Type Definitions *******************************/
72 /************************** Constant Definitions *****************************/
74 /************************** Variable Definitions *****************************/
76 /************************** Function Prototypes ******************************/
78 /****************************************************************************
80 * Set the time in the Global Timer Counter Register.
82 * @param Value to be written to the Global Timer Counter Register.
86 * @note In multiprocessor environment reference time will reset/lost for
87 * all processors, when this function called by any one processor.
89 ****************************************************************************/
90 void XTime_SetTime(XTime Xtime)
92 /* Disable Global Timer */
93 Xil_Out32(GLOBAL_TMR_BASEADDR + GTIMER_CONTROL_OFFSET, 0x0);
95 /* Updating Global Timer Counter Register */
96 Xil_Out32(GLOBAL_TMR_BASEADDR + GTIMER_COUNTER_LOWER_OFFSET, (u32)Xtime);
97 Xil_Out32(GLOBAL_TMR_BASEADDR + GTIMER_COUNTER_UPPER_OFFSET,
100 /* Enable Global Timer */
101 Xil_Out32(GLOBAL_TMR_BASEADDR + GTIMER_CONTROL_OFFSET, 0x1);
104 /****************************************************************************
106 * Get the time from the Global Timer Counter Register.
108 * @param Pointer to the location to be updated with the time.
114 ****************************************************************************/
115 void XTime_GetTime(XTime *Xtime)
120 /* Reading Global Timer Counter Register */
123 high = Xil_In32(GLOBAL_TMR_BASEADDR + GTIMER_COUNTER_UPPER_OFFSET);
124 low = Xil_In32(GLOBAL_TMR_BASEADDR + GTIMER_COUNTER_LOWER_OFFSET);
125 } while(Xil_In32(GLOBAL_TMR_BASEADDR + GTIMER_COUNTER_UPPER_OFFSET) != high);
127 *Xtime = (((XTime) high) << 32) | (XTime) low;